West of the Rio Puerco, near Mt Taylor is La Ventana Mesa with a maze of canyons connected by windows eroded in the sandstone. I first "discovered" these windows about a year ago in September 2016. When I overlayed my GPS track over topo maps, I saw...
http://www.jeffsflightlog.com/2018/2018_10_29_grand_gulch.pdf
Here is Day 3 of my Arizona Flying Adventure. A short hop to the Grand Gulch Mine and Airstrip, followed by an ATV tour to the rim of the Grand Canyon.